Well, I had the day off of work today and thought I might mess around with an idea I had. A paint brush stub! It acts the same way as a fountain pen nib. Using a shaped tip to provide line variation. If you don't know what a stub nib is, this is a great example of one. The sideways strokes are thin, while the up and down strokes are wide. This is basically the easy way to get line variation as opposed to a flex nib.
So here it is, a huge paint brush stub "nib". This thing laid down a massive wet line. It was a lot of fun to use, but one could run through a bottle of ink very quickly doing this!
As always, just click on the picture for an enlarged super-view of it.
Compared next to my hand! Wow, that's big!